fixed accidentally reverted functions and docs. John

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rcmdr@569 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Updated reverted histogram dialog. John

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rcmdr@570 edb9625f-4e0d-4859-8d74-9fd3b1da38cb